US4128682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auto ceiling panel and its manufacturing method
Assignee: Toyota Motor Corp
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Filing: 1978-03-30
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Granted: 1978-12-05
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Expires: 1998-03-30
Abstract
Abstract Auto ceiling panel with an improved sound-absorbing effect which is obtained by thermally fusing a polyethylene foam with numerous small holes and another polyethylene foam with numerous large holes with a metal lath sandwiched between them; and its manufacturing method.
Inventors
- 👤 Takao Nomura
- 👤 Yoshiro Umemoto
- 👤 Tatsuo Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:07
CPC Classifications
B; B60; B60R; B60R13/00; B60R13/02; B60R13/0212; B60R13/0225; B60R13/08; B60R13/0815; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1052; Y10T156/1056; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24479; Y10T428/24496; Y10T428/24942; Y10T428/2495; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
Auto ceiling panel comprising: a polyethylene foam on the auto interior side which has been bored with numerous small holes; a polyethylene foam on the ceiling side to be pasted to said polyethylene foam which has been bored with numerous large holes; and a metal lath sandwiched between said auto interior side polyethylene foam and said ceiling side polyethylene foam.
Claim 2
Dependent Claim
60 words
Auto ceiling panel comprising: a polyethylene foam on the auto interior side which has been bored with numerous small holes; a polyethylene foam on the ceiling side to be pasted to said polyethylene foam which has been bored with numerous large holes; and a metal lath sandwiched between said auto interior side polyethylene foam and said ceiling side polyethylene foam.
Claim 3
Dependent Claim
25 words
Auto ceiling panel of claim 1, wherein the small holes bored in said interior side polyethylene foam are 0.1 mm - 2 mm in diameter.
Claim 4
Dependent Claim
24 words
Auto ceiling panel of claim 1, wherein the large holes in said ceiling side polyethylene foam are 2.0 mm - 5.0 mm in diameter.
Claim 5
Dependent Claim
18 words
Auto ceiling panel of claim 1, wherein an embossed pattern is given to said interior side polyethylene foam.
Claim 6
Dependent Claim
23 words
Auto ceiling panel of claim 1, wherein a permeable leather is attached to the interior side surface of said interior side polyethylene foam.
Claim 7
Dependent Claim
29 words
Auto ceiling panel of claim 1, wherein said interior side polyethylene foam and said ceiling side polyethylene foam are thermally fused together with a metal lath sandwiched between them.
Claim 8
Dependent Claim
91 words
Auto ceiling panel manufacturing method characterized by comprising: a step of boring numerous small holes in a polyethylene foam and boring numerous large holes in another polyethylene foam; a step of giving an embossed pattern to only the small-holed polyethylene foam before or after its boring; a step of thermally fusing together said embossed, small-holed polyethylene foam and said large-holed polyethylene foam with a metal lath sandwiched between them; and a step of molding a laminated product thus obtained to a specific profile of auto ceiling in a cold press-molding machine.
Claim 9
Dependent Claim
91 words
Auto ceiling panel manufacturing method characterized by comprising: a step of boring numerous small holes in a polyethylene foam and boring numerous large holes in another polyethylene foam; a step of giving an embossed pattern to only the small-holed polyethylene foam before or after its boring; a step of thermally fusing together said embossed, small-holed polyethylene foam and said large-holed polyethylene foam with a metal lath sandwiched between them; and a step of molding a laminated product thus obtained to a specific profile of auto ceiling in a cold press-molding machine.
Claim 10
Dependent Claim
28 words
Auto ceiling panel manufacturing method of claim 7, wherein the diameter of a small hole bored in one polyethylene foam is set at 0.1 mm - 2.0 mm.
Claim 11
Dependent Claim
29 words
Auto ceiling panel manufacturing method of claim 7, wherein the diameter of a large hole bored in the other polyethylene foam is set at 2.0 mm - 5.0 mm.
Claim 12
Dependent Claim
27 words
Auto ceiling panel manufacturing method of claim 7, wherein the interior side surface of one polyethylene foam is attached with a permeable leather in an additional step.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |